In Jain Dharma, there is no substitute “bath” for a monk or nun like in some other practices.

• Sadhus/Sadhvis generally do not bathe in the worldly sense; they follow aparigraha and simple living.
• Shwetambar and Digambar traditions both emphasize inner purity over external washing.
• In murtipujak Jain worship, the Tirthankar idol may be bathed with water, milk, sandal water, or other pure substances during puja.

So if you mean a person, the Jain focus is not on bathing with another liquid, but on self-restraint, cleanliness, and inner purification.